Retaining mechanism



1932- F.. c. EASTMAN 1,882,068

I RETAINING MECHANISM Original Filed Feb. 20. 1930 z'sheets-sheet 1v MQ QM Oct. 11, v1932. F c EASTMAN 1,882,068

RETAINING MECHANISM Original Filed Feb? 20, 1950 ZSheets-Sheet 2 I ratchet mechanism Patented Oct. 11, 1932 RETAINING MECHANISM I Original application filed February 20, 1930, Serial No. 430,048.

Serial This invention relates to retaining mechanism, the present application being a division of a copending application for Letters Patent for improvementsv in machines for use in the manufacture of shoes, Serial N 0. 430,048, ile

pects it is not limited to retaining of that particular character. e

In machines of various kinds there is sometimes provided special mechanism, for example, pawl and ratchet mechanism, for retaining or holding a movable device or memwhich is moved;

operate with great precision and effectiveness, and more particularly, as applied to pawl and ratchet mechanism, to provide a avoid back-lash between a pawl and the co-operatingratchet teeth. a For the purpose in view the construction herein shown comprises pawl and having ratchet teeth at are movable relatively to the pawl with advance the pawl until it abuts against one of the teeth.

bined with the eccentric in moving the pawl relation to the series of teeth. As illustrated,

ere are provided a plurality of pawls controlled as described and arranged in staggered relation to reduce the amount of move-- ment that may be necessary to bring one of them into holding relation to the nearest tooth, but it is vention is not rality of limited to th pawls. It will be further understood the pawl and ratchet mech he novel features of the invention will now be more particularly described by reference to the accompanying drawings and thereafter pointed out in the claims, the invention being dlvision,

In the drawings,

ig. 1 is a view showing partly in elevation above-mentioned machine including the novel pawl and ratchet mechanism;

Fig. 2 is a perspective view illustrating in greater detail the means for controlling two of the pawls; and

ig. 3 is a view similar to a portion of Fig. 1, showing one of the pawls in its idle position. c

As more fully disclosed in the above-mentioned movable to a position in front of the edges of the wipers 10, as illustrated in ig. 1, for guiding fastenings driven of pins 18, thedrawings, which are arranged to be understood that the ine use'of a plu-' and 'partly' in section portions of the 7 and acts .throu 1 at. its upper end with a on the frameof the machine,

in a lower bearing w and in the operation of the into supporting engage- L yieldingly o bears at its upper end on a collar 38 slidingly through holes in the insole into sockets in the last. For maintaining the shoe and last in the position determined by these pins an for'supporting it against pressureapplied on its bottom face, there is provided a toe rest 20 having a' pa 22 for engaging the shoe, this toe rest being mounted on the upper end of a rod 24 which is vertically movable in an upper fixed bearing26 an 28'formed in a 80 which is fast on the frame of the machine. Initially the toe rest 20 is in a lower position than indicated in the drawings to permit the last andshoe to-be mounted on machine it is moved upwardly ment with the shoe. For imparting suc upward movement to the toe rest and its supporting rod 24, there is provided a sleeve '32 which is slidingly. movable on the rod 24 gh a spring 34 in engagement collar .36fast on the rod to raise y i against'the shoe.- mounted on a reduced portion of the rod 24 and engagingthe-lower end of the spring 34, this collar being arranged to, engage a shoulder v 4O on the rod when the parts are instarting positions so that the spring .34 is at that time under a substantialarnount o' compression between the two collars 36 and 38. The sleeve 32 is connected by'links 42, only one of which is shown in the drawings, to the forked end of a lever 44 and the other by .a link 48 to i 52 end of this lever is connected a crank pin carriedby a gear wheel The shaft 5.4 -is operated by a trolled mechanism, not shown in ings, whereby the shaft is turned through a half revolution at each actuation of the clutch. Accordingly, upon one actuation of the clutch, the toe rest--20 is moved upwardly into supporting engagement 1 with the shoe, and upon a second actuation of the clutch,

clutch-conafter. thelasting operations have been perthere is provided means for formed, it is lowered to itsstartingposition. In order to hold the last and up in the position determined by the pins 18, holding the rod 24 positively against any downward movement from the position to which it is raised in forcing the toe rest against the shoe. For this purpose there is securedlon the lower end portion of the rod a member 56 provided-with a series of downwardly facing ratchetteeth 58 arranged to cooperate with a plurality of detents or pawls. 60. supported on thefix ed bracket 80; The member 56 is mounted on a reduced portion of therod 24 so that it bears ,at its upper end against a shoulder on the rod, .anditis secured in place by set screws 62. In the construction shown the pawls 60 are four bracket the pins 16, j

A against any purpose the 'lowerpairare swivelled on an eccentrlc' 64 hearings in the bracket 30. 2 pawls-isconnectedby' a coiled spring 68 to pivoted at 46 58. In order still further to insure against thefpossibility of' any lost motion or back lash between the pawls and the ratchet teeth such as to permit downward yield of the toe .re'st 20 when'thepressure ispappliedo'n the bottom" of the shoe, this invention provides means for controlling the pawls 1n such manneras to insure that one of them will be positioned in effective holding relation to one of the ratchet teeth to support-the toe rest downward movement. For this two pawls of each upper .an

which" is part of arock shaft 66 mounted in i Each of are two one end of the head; of IaUT-shaped p1n 7O which is fast in the shaft 66 and. projects 1 through-a slot 7 2. (Fig. 2) formed partly in V the side of the hubof each pawl. The springs 68'thus serve as yielding connections through which the pawls are swung toward and from the ratchet teeth 58. by turni'ngmovements of the shaft 66, andthe slot 7 2 permits the shaft to turn rel .tively to'the pawls after theyhave been swunginto engagement with. the ratchet teeth. Each of theshafts 66 isprovidedwith a'cranlr arm74, and the two crank armsare pivotally connected to a pair. of links so that the two shafts are turned in unison. The

tends upwardlythrough a.thi1nble 8O slidingly movable onthe 'rod,.this thimble being loosely mounted in an opening. formedin a plate 82 secured to an arm 84 which projects from the sleeve 32, and'hav ing. on its 86 for engag'ing the plate 82. Between the thimble 8O and a collar on the upper-end of the rod 78 isfa spring 90- Below the thinible 8lO -is'acollar 92 which is 7 When the parts are in starting positions fast on the rod the sleeve32 p0. 3 and in dotted lpins 7O engaging the hubs of the pawls at the lower, ends. of

theslots 72. -When the sleeve sha'fti5'4 to carry 32 is moved upwardly by the 1, the thimble EEO-rests upon the 68 fast a v spring 90 to lift the'rod 78, th 10 not ratchet tooth will ingrelation to the tooth ment to understood t the toe rest 20 into at the time when the spring 34 begins to yield in response to the upward movement of the sleeve 32, the plate 82 engages the flange 86 of the thimble and acts through the ereby turning As theshafts 66 are thus relation to the ratchet teeth through the provided by the springs 68, 1e eccentrics 64 being turned with the shats, and in the latter part of the turnin movements of the shafts the eccentrics are carried to such positions that they impart to the pawls upward movements, lengthwise of the series of ratchet teeth 58, tl that the pawl which is nearest to thelower face be carried into holdto serve as an abutpreventany downward movement of the rod 24. In any further ment of the sleeve 32 that may take place after a pawl has thus been seated against a ratchet tooth the spring 90 yields, the thiinble being carried upwardly away from the collar 92, as indicated in Fig. 1. Itwill'be understood that after one of the pawls has been seated firmly against one of the sure ofthe shoe on the is thus afforded that the'pins 18 and will downward applied on its bottom face in the overwiping and upper-fastening operations. t will be hat in the return of the parts to positions the pawls 60 through the be supported against any arting spring connections 68 are swung outwardly so as to rehe invention, what I claiinas new and desire to secure by Letters States is:

cooperating member arranged to act as a dearranged to cooperate with some one of'said evice, an eccentric on which tent in abutting relation to some one of said teeth to hold the ClGVlCe, one of said members being movable ly to the other member, and fecting relative movement of in a direction lengthwise of teeth after means forefsaid members said series of the movement of said device has a member are swung into operative d moving said other member in 111s insuring th ing of th yield in response to the pressure 1 881d pawl is mounted, and

insure a cobeen substantially completed to detent memit is moved, said holding having a series of teeth thereon,

a cooperating inemb etent in abutting said teethto hold the device, one of said bers being movable with said device relher member, andmeans for arranged to act as a pawl in operative relation to said ratchet teeth one of said members being movable with said device, and means to I member movement in a direction lengthwise of the series of ratchet teeth after the movement of said device has been substantially completed to insure the positione pawl member in holding relation to one of the teeth. I I

4. In mechanism of the class described, the combination with a device movable from one position to another position,

a member movable with said device and having a series of ratchet teeth thereon, a pawl arranged to cooperate with some one of said teeth to hold the device, and

ing the pawl in the same direction assaid the positioning of the pawl in holding relahereon, a "pawl teeth to hold the d means for turning said I resence I the positioning-of the pawl in'jholdi'ng rela pawl in a direction lengthwise of the series tion to one of the teeth. 1 i f; of teeth, an eccentricon which the-pawl. is 6. In mechanism of the class described, the mounted, and means for turning said eccencombinationwith adevice movable from one trio after said relative movement has been 5 position to another position, of means for substantially completed to insure the posiholding-said-device inthe position to which tioning of the pawl in holding relation to it is moved, said holding meanscomprising a one of theteeth. v 7 member movable withsaidfdevice; and hav- 12: In retaining mechanism, the combina- I ing a series of ratchet teeth thereon, a pawl tion-of a member. provided with a series of, arranged to cooperate with some one of said ratchet teeth, a pawl arranged to cooperate 5 teeth to hold the device, and means formov with said ratchet .teeth, means for efiecting ing the pawl into operative relati'onto' the relative movement of said member and pawl seriesof'teeth and for also moving it in a in a direction lengthwise of'the series of directionleiigthwise of the series of teeth teeth, andmeansarranged to operate after to insure its holding relation to one of the said relative movement has been substan- 9 teeth. f V tial'ly completedto move the pawlinto oper- 'TIn retaining mechanism, the combinaative relationto the ratchet teeth and also tion of a member provided with aseries of in a direction lengthwise of the series of teeth, a member arranged to act as a detent teeth to insure-its holding relation to one of in engagement with some one'of saidfteeth, the eeth- 85 means for efiecting relative movement of said 13,. In retaining mechanism, thezcombinamembers lengthwise of the series 0 teeth, l lpri f a member rovided with a series of gandmeans for eifecting a different relative ra te th, a pawl arranged to cooperate. movement of'said memberslengthwise of the with said ratche teeth, means for moving series of teeth substantially t the end of said said member relatively to thepawlin a di- 0 first relative movement, to insurethe posicti lengthwlse 0f e HE pf eth, a A ti i' f th det t b i h ldi vrotatable shaft, an eccentric carried by said lation to one of th t th; I 1 shaft and on which the pawl is mounted, 8. In retaininggmechanisn the combinans also arr d-by he shaft forcon- 39 tion of a member provided with a series'of o g. 'p w sw ng i in o 01 O t of 5 teeth, adetent arranged for holding engage- Operative l ioli to the teeth, and means 'ment with some one of said teeth, means for n g the Shaft 111 au a y. moving said toothed member realtively to the m l lme relation to the movement of said detent in a direction lengthwise ofthe series ratchet member to swmg the p toward of. teeth, and means for imparting to th d the teeth and also to cause the eccentric to 190 tent movement in a direction lengthwise of 3 it g hwi e f e Serles Of teeth into the series of teeth after the movement of said gt o t0 0116 of the htoothed member has been substantially coma -1 p and i h mechanism, the leted to insure the positioning of the detent Q Q of & $91195 f h h t a 4 intholding l ti t one f th t th pawl arranged to cooperate with said ratchet 1 Ql 9.- In retaining mechanism, the combinateeth, rotatable Shaft P i i an tion of a member provided with a series of O11 Whlch pa 13 d a ratchet teeth, a memberarranged to act as a spnng n j k y f bait for swlngmg pawl in operativerelation to the ratchet teeth, h p y e g y n ngagement wit meansfor moving one f aid members 1 7, the ratchet teeth as the shaft is turned, and 1 tively to the other in a direction lengthwise fl ms e Shaft t0 SWIIIg the of the, series of teeth, and means for there- P w e g s m n w th t e h h to after imparting to said pawl memb movecause the eccentric to move it lengthwise of V ment lengthwise'of the series of teeth to ingenes. of e 9 7 sure its holding relation to one of the teeth. pa and f h mechanlsmr the 1 '10..In retaining mechanism, the combinacombmatlon f 5 3 of 'f h t e ,tion of a member provided with a series of P arranged to Cooperate h 3 hatchet ratchet teeth, a pawl arranged to cooperate h rotatablfifshaft P v f Wt an withsaid ratchet teeth, means for moving ecceinirlc F h p w I said memberhrelatively to the pawl, and means, a d b f r lmre t means for imparting to thepawl after the tothe P l swmgmg V P about t movement of said member has been substaneccentrm lnto out operatlve Tehtlon. .tially completed a movement in the same-$ e ratchet h, an'd'meanS t g direction to insure its holding relation to one i Shaft t0 i g t p l toward h of'the teeth. ratchet teeth and to, cause he eccentric to 11. In retaining "mechanism, the combimove, it lengthwise of the series of teeth. nation of a member provided with a series 16. Inpawl and ratchet mechanism, the

' ofratchet teeth, a pawl arranged to coopercombination of a series of ratchet teeth,'a

' ate with said ratchet teeth, means for effectpawl arranged-to cooperate with sa d ratchet ingrelative niovementQof said member and teeth, a rotatable shaft provided Wltll an FRED O. EASTMAN. 

